First you need the ROSE Evo client. I prefer you use bittorrent to download it
here.
This will have the least patches because it is aleady the closest version, v1.62.
Next, you will need
Hamachi.
And last thing, you will need the
patch.
After you have them all installed except or the patch, run the ROSE Evo client. It will start patching, and once it's done, you have to press Play Game and a setting window will pop up. Change it to Window Mode, that is the most safe setting because if you don't play in Window Mode, you are most likely to get a client error.
Install Hamachi, and connect to the server:
FailureROSE
The password is "thisisfail" without the quotation marks of course.
Now you are all set, and you just have to extract and replace the patch into your ROSE folder. Double click the Pwn Launcher and you will get to the login screen after the really long introduction. To register, you enter your account and password once, and enter it again. The first time it will say the account does not exist, but the second time will let you in. HAVE FUN GUYS!